USGS: Science Topics: springs (hydrographic)

Science Topics

Springs (hydrographic)

Places where underground water flows naturally to the surface of the Earth. [USGS Feature Class Definitions <http://geonames.usgs.gov/domestic/feature_class.htm>]

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Geochemistry of the Arbuckle-Simpson Aquifer [More info]: Describes the geographic extent, quality, origin, and dynamic character of this aquifer located in south central Oklahoma.
Nitrate concentrations and potential sources in the Barton Springs segment of the Edwards aquifer and its contributing zone, Central Texas [More info]: The area contributing recharge to this aquifer is undergoing rapid growth, generating more wastewater. We found that nitrate, a major component of wastewater and a nutrient that can degrade water quality, has increased in the creeks in this area.

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U.S. Department of the Interior | U.S. Geological Survey
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